Well monitor plug



FIG. 1 is a top plan view of a well monitor plug, showing my new design in open position;

FIG. 2 is a top plan view thereof, in a closed position;

FIG. 3 is a side elevational view thereof, in a open position;

FIG. 4 is a side elevational view thereof, in a closed position;

FIG. 5 is a rear elevational view thereof, in a open position;

FIG. 6 is a rear elevational view thereof, in a closed position;

FIG. 7 is a front elevational view thereof, in a open position;

FIG. 8 is a front elevational view thereof, in a closed position; and,

FIG. 9 is a bottom plan view thereof. 

The ornamental design for a well monitor plug, as shown and described. 